Universal Agent Skill Converter

Name: Antigravity Skill Converter
Author: Shaashie Kumha

Convert agent skills from Anthropic Claude Code, GitHub Copilot CLI, Amp, Cursor, and Cline into 100% native, progressive-disclosure Google Antigravity skills.

Star & View on GitHub CLI Quickstart

The 4-Stage Conversion Pipeline

Frontmatter Ingestion

Normalizes YAML headers, strips host-specific flags (allowed-tools:), and crafts high-citability third-person trigger descriptions.

Tool Translation

Replaces external commands (Bash, View, Edit, Write) with native Antigravity primitives using single-pass token regex.

Progressive Partitioning

Extracts heavy reference documentation and sub-manuals into references/, keeping SKILL.md lean to conserve model context.

Asset Bundling

Recursively mirrors helper scripts, test suites, and schema templates into standard scripts/, examples/, and resources/.

In-Chat Conversational Invocations

Antigravity dynamically indexes skill-converter. Trigger it naturally in any conversation:

agy, convert the claude skill at "C:\path\to\skill" to antigravity

agy, port my copilot skill in .github/skills/deploy to antigravity

agy, migrate all skills in ~/.claude/skills into ~/.agents/skills

Direct Command-Line Usage (CLI)

The core migration engine convert_skill.py runs in any terminal without external dependencies:

python scripts/convert_skill.py "path/to/source-skill"

python scripts/convert_skill.py "path/to/skills-root" --batch -o "~/.agents/skills"

python scripts/convert_skill.py "path/to/source-skill" --dry-run

Tool Mapping Crosswalk

Automated replacement mapping from external agent tools to Antigravity primitives:

Source Agent Tool	Antigravity Native Tool	Operational Rules & Differences
Bash / execute_command	run_command	Executes via PowerShell; accepts `CommandLine`, `Cwd`, and `WaitMsBeforeAsync`. Never issues `cd`.
View / Read / read_file	view_file	Requires absolute path; supports line range slicing (`StartLine`, `EndLine`) to protect context.
Edit / replace_in_file	replace_file_content	Surgical line-range replacement. Exact matching inside specified bounds prevents collateral edits.
Write / write_to_file	write_to_file	Writes whole files; omits `ArtifactMetadata` for workspace source files.
Grep / search_files	grep_search	Blazing fast ripgrep searching across files with glob filters.
Glob / file_search	find_by_name	High-performance file/directory pattern resolution using `fd`.
AskUser	ask_question	Interactive multi-choice modal rendered directly inside the chat UI canvas.
$ARGUMENTS	<user-arguments>	Transpiled into semantic argument parsing guidance for the model.

Repository Structure

antigravity-skill-converter/ ├── SKILL.md # Antigravity skill spec ├── LICENSE # Open-source MIT License ├── README.md # Comprehensive documentation ├── docs/ │ └── skill-converter-guide.html # This manual ├── scripts/ │ └── convert_skill.py # Python CLI engine ├── references/ # Tool & frontmatter specs └── examples/ # Before/after samples

Open-Source MIT License

This project is released under the MIT License. It is free and open-source software, permitting unrestricted personal, academic, and commercial usage, modification, distribution, and private deployment.

Maintained by Shaashie Kumha (2026).